Update copyright

Use gnulib's update-copyright script.

* src/roff/groff/groff.cpp: update the printf displayed when 'groff -v' is invoked.

* FOR-RELEASE: mention this point.

59 files changed, 59 insertions, 59 deletions

diff --git a/contrib/chem/ChangeLog b/contrib/chem/ChangeLog
index 37cc45050..0dbd1ea3f 100644
--- a/contrib/chem/ChangeLog
+++ b/contrib/chem/ChangeLog
@@ -303,7 +303,7 @@
 ________________________________________________________________
 License
 
-Copyright (C) 2006-2018  Free Software Foundation, Inc.
+Copyright (C) 2006-2020 Free Software Foundation, Inc.
 Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 Copying and distribution of this file, with or without
diff --git a/contrib/chem/README.txt b/contrib/chem/README.txt
index ffd89b0ea..06baed2df 100644
--- a/contrib/chem/README.txt
+++ b/contrib/chem/README.txt
@@ -24,7 +24,7 @@ are written in the 'chem' language.  The file names end with .chem.
 
 ####### License
 
-Copyright (C) 2006-2018 Free Software Foundation, Inc.
+Copyright (C) 2006-2020 Free Software Foundation, Inc.
 Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/chem.1.man b/contrib/chem/chem.1.man
index db5dde75f..cb7a7803d 100644
--- a/contrib/chem/chem.1.man
+++ b/contrib/chem/chem.1.man
@@ -7,7 +7,7 @@
 .\" Legal Terms
 .\" ====================================================================
 .\"
-.\" Copyright (C) 2006-2018 Free Software Foundation, Inc.
+.\" Copyright (C) 2006-2020 Free Software Foundation, Inc.
 .\"
 .\" This file is part of chem, which is part of groff, a free software
 .\" project.
diff --git a/contrib/chem/chem.am b/contrib/chem/chem.am
index 7bd89b835..148ae171c 100644
--- a/contrib/chem/chem.am
+++ b/contrib/chem/chem.am
@@ -1,6 +1,6 @@
 # Automake rules for 'chem'
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 # Moved to automake by Bertrand Garrigues
 #
diff --git a/contrib/chem/chem.pic b/contrib/chem/chem.pic
index f7bd39ea9..33e932c69 100644
--- a/contrib/chem/chem.pic
+++ b/contrib/chem/chem.pic
@@ -1,6 +1,6 @@
 # macros for chem
 	
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Brian Kernighan <http://cm.bell-labs.com/cm/cs/who/bwk>,
 # modified by Bernd Warken <groff-bernd.warken-72@web.de>.
 
diff --git a/contrib/chem/examples/122/README.txt b/contrib/chem/examples/122/README.txt
index 8d96ffedb..6f3809b6a 100644
--- a/contrib/chem/examples/122/README.txt
+++ b/contrib/chem/examples/122/README.txt
@@ -29,7 +29,7 @@ You can view the graphical display of the examples by calling
 
 ####### License
 
-Copyright (C) 2006-2018 Free Software Foundation, Inc.
+Copyright (C) 2006-2020 Free Software Foundation, Inc.
 Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/examples/122/ch2a_ethyl.chem b/contrib/chem/examples/122/ch2a_ethyl.chem
index 961882d2a..089de73a8 100644
--- a/contrib/chem/examples/122/ch2a_ethyl.chem
+++ b/contrib/chem/examples/122/ch2a_ethyl.chem
@@ -9,7 +9,7 @@ ch2a_ethyl.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch2b_benzene.chem b/contrib/chem/examples/122/ch2b_benzene.chem
index 54c4227ca..0af1c9fc9 100644
--- a/contrib/chem/examples/122/ch2b_benzene.chem
+++ b/contrib/chem/examples/122/ch2b_benzene.chem
@@ -9,7 +9,7 @@ ch2b_benzene.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch2c_benzene_right.chem b/contrib/chem/examples/122/ch2c_benzene_right.chem
index 4f9147e70..d9f29b5c1 100644
--- a/contrib/chem/examples/122/ch2c_benzene_right.chem
+++ b/contrib/chem/examples/122/ch2c_benzene_right.chem
@@ -9,7 +9,7 @@ ch2c_benzene_right.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # 'groff' is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License (GPL) version 2 as
diff --git a/contrib/chem/examples/122/ch4a_stick.chem b/contrib/chem/examples/122/ch4a_stick.chem
index 557bd9242..f4caef304 100644
--- a/contrib/chem/examples/122/ch4a_stick.chem
+++ b/contrib/chem/examples/122/ch4a_stick.chem
@@ -9,7 +9,7 @@ ch4a_stick.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4b_methyl_acetate.chem b/contrib/chem/examples/122/ch4b_methyl_acetate.chem
index 8188b5fce..31625a31d 100644
--- a/contrib/chem/examples/122/ch4b_methyl_acetate.chem
+++ b/contrib/chem/examples/122/ch4b_methyl_acetate.chem
@@ -9,7 +9,7 @@ ch4b_methyl_acetate.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4c_colon.chem b/contrib/chem/examples/122/ch4c_colon.chem
index 20c418f8d..5e42f6b1a 100644
--- a/contrib/chem/examples/122/ch4c_colon.chem
+++ b/contrib/chem/examples/122/ch4c_colon.chem
@@ -9,7 +9,7 @@ ch4c_colon.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4d_HCl.H2O.chem b/contrib/chem/examples/122/ch4d_HCl.H2O.chem
index 855e53f36..b6ac99d2e 100644
--- a/contrib/chem/examples/122/ch4d_HCl.H2O.chem
+++ b/contrib/chem/examples/122/ch4d_HCl.H2O.chem
@@ -9,7 +9,7 @@ ch4d_HCl.H2O.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem b/contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem
index 371145796..b2f8bc0db 100644
--- a/contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem
+++ b/contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem
@@ -9,7 +9,7 @@ ch4e_CaSO4.2H2O.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4f_C.chem b/contrib/chem/examples/122/ch4f_C.chem
index 080794efb..d54461fec 100644
--- a/contrib/chem/examples/122/ch4f_C.chem
+++ b/contrib/chem/examples/122/ch4f_C.chem
@@ -9,7 +9,7 @@ ch4f_C.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4g_BP.chem b/contrib/chem/examples/122/ch4g_BP.chem
index d14504ffb..9c6af4b02 100644
--- a/contrib/chem/examples/122/ch4g_BP.chem
+++ b/contrib/chem/examples/122/ch4g_BP.chem
@@ -9,7 +9,7 @@ ch4g_BP.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4h_methacrylate.chem b/contrib/chem/examples/122/ch4h_methacrylate.chem
index 8c0df38a1..8300d25c8 100644
--- a/contrib/chem/examples/122/ch4h_methacrylate.chem
+++ b/contrib/chem/examples/122/ch4h_methacrylate.chem
@@ -9,7 +9,7 @@ ch4h_methacrylate.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4i_cyclo.chem b/contrib/chem/examples/122/ch4i_cyclo.chem
index dae24a34c..866e6f7ce 100644
--- a/contrib/chem/examples/122/ch4i_cyclo.chem
+++ b/contrib/chem/examples/122/ch4i_cyclo.chem
@@ -9,7 +9,7 @@ ch4i_cyclo.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4j_ring4.chem b/contrib/chem/examples/122/ch4j_ring4.chem
index 3de3a4561..9caf7184f 100644
--- a/contrib/chem/examples/122/ch4j_ring4.chem
+++ b/contrib/chem/examples/122/ch4j_ring4.chem
@@ -9,7 +9,7 @@ ch4j_ring4.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4k_ring3.chem b/contrib/chem/examples/122/ch4k_ring3.chem
index ce5250fd3..2a2d856dd 100644
--- a/contrib/chem/examples/122/ch4k_ring3.chem
+++ b/contrib/chem/examples/122/ch4k_ring3.chem
@@ -9,7 +9,7 @@ ch4k_ring3.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4l_vertex.chem b/contrib/chem/examples/122/ch4l_vertex.chem
index 62483946e..d9fcb079a 100644
--- a/contrib/chem/examples/122/ch4l_vertex.chem
+++ b/contrib/chem/examples/122/ch4l_vertex.chem
@@ -9,7 +9,7 @@ ch4l_vertex.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4m_double.chem b/contrib/chem/examples/122/ch4m_double.chem
index 5302d420e..c5b137338 100644
--- a/contrib/chem/examples/122/ch4m_double.chem
+++ b/contrib/chem/examples/122/ch4m_double.chem
@@ -9,7 +9,7 @@ ch4m_double.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4n_triple.chem b/contrib/chem/examples/122/ch4n_triple.chem
index cf1be347c..5766f85ef 100644
--- a/contrib/chem/examples/122/ch4n_triple.chem
+++ b/contrib/chem/examples/122/ch4n_triple.chem
@@ -9,7 +9,7 @@ ch4n_triple.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4o_aromatic.chem b/contrib/chem/examples/122/ch4o_aromatic.chem
index 11f38058f..aa303c7f3 100644
--- a/contrib/chem/examples/122/ch4o_aromatic.chem
+++ b/contrib/chem/examples/122/ch4o_aromatic.chem
@@ -9,7 +9,7 @@ ch4o_aromatic.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # 'groff' is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License (GPL) version 2 as
diff --git a/contrib/chem/examples/122/ch4p_cholestanol.chem b/contrib/chem/examples/122/ch4p_cholestanol.chem
index 0746ebc87..e292beaf4 100644
--- a/contrib/chem/examples/122/ch4p_cholestanol.chem
+++ b/contrib/chem/examples/122/ch4p_cholestanol.chem
@@ -9,7 +9,7 @@ ch4p_cholestanol.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4q_rings.chem b/contrib/chem/examples/122/ch4q_rings.chem
index e7e3a2f20..bafdd927e 100644
--- a/contrib/chem/examples/122/ch4q_rings.chem
+++ b/contrib/chem/examples/122/ch4q_rings.chem
@@ -9,7 +9,7 @@ ch4q_rings.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4r_spiro.chem b/contrib/chem/examples/122/ch4r_spiro.chem
index 8b7ced2ed..24ec05062 100644
--- a/contrib/chem/examples/122/ch4r_spiro.chem
+++ b/contrib/chem/examples/122/ch4r_spiro.chem
@@ -9,7 +9,7 @@ ch4r_spiro.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4s_heteroatoms.chem b/contrib/chem/examples/122/ch4s_heteroatoms.chem
index 848c72a04..7dc8ba7a9 100644
--- a/contrib/chem/examples/122/ch4s_heteroatoms.chem
+++ b/contrib/chem/examples/122/ch4s_heteroatoms.chem
@@ -9,7 +9,7 @@ ch4s_heteroatoms.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4t_polycyclic.chem b/contrib/chem/examples/122/ch4t_polycyclic.chem
index d3a0f10ba..fc6b58044 100644
--- a/contrib/chem/examples/122/ch4t_polycyclic.chem
+++ b/contrib/chem/examples/122/ch4t_polycyclic.chem
@@ -9,7 +9,7 @@ ch4t_polycyclic.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4u_nicotine.chem b/contrib/chem/examples/122/ch4u_nicotine.chem
index 9c3338da9..d38a7c8eb 100644
--- a/contrib/chem/examples/122/ch4u_nicotine.chem
+++ b/contrib/chem/examples/122/ch4u_nicotine.chem
@@ -9,7 +9,7 @@ ch4u_nicotine.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4v_histidine.chem b/contrib/chem/examples/122/ch4v_histidine.chem
index 5d0dade6b..33a4e9db3 100644
--- a/contrib/chem/examples/122/ch4v_histidine.chem
+++ b/contrib/chem/examples/122/ch4v_histidine.chem
@@ -9,7 +9,7 @@ ch4v_histidine.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4w_lsd.chem b/contrib/chem/examples/122/ch4w_lsd.chem
index cfb5d11ab..aa68b00a6 100644
--- a/contrib/chem/examples/122/ch4w_lsd.chem
+++ b/contrib/chem/examples/122/ch4w_lsd.chem
@@ -9,7 +9,7 @@ ch4w_lsd.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4x_anisole.chem b/contrib/chem/examples/122/ch4x_anisole.chem
index 727389668..ec78417ba 100644
--- a/contrib/chem/examples/122/ch4x_anisole.chem
+++ b/contrib/chem/examples/122/ch4x_anisole.chem
@@ -9,7 +9,7 @@ ch4x_anisole.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4y_reserpine.chem b/contrib/chem/examples/122/ch4y_reserpine.chem
index 36b0d30c9..fb5d1caf3 100644
--- a/contrib/chem/examples/122/ch4y_reserpine.chem
+++ b/contrib/chem/examples/122/ch4y_reserpine.chem
@@ -10,7 +10,7 @@ ch4y_reserpine.chem:
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 # Some corrections were added.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4z1_eqn_glutamic.chem b/contrib/chem/examples/122/ch4z1_eqn_glutamic.chem
index ac63463ba..6cecd7c5b 100644
--- a/contrib/chem/examples/122/ch4z1_eqn_glutamic.chem
+++ b/contrib/chem/examples/122/ch4z1_eqn_glutamic.chem
@@ -13,7 +13,7 @@ delim $$
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 # Some corrections were added.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch4z2_text.chem b/contrib/chem/examples/122/ch4z2_text.chem
index c4b92785d..2000636de 100644
--- a/contrib/chem/examples/122/ch4z2_text.chem
+++ b/contrib/chem/examples/122/ch4z2_text.chem
@@ -9,7 +9,7 @@ ch4z2_text.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch5a_size.chem b/contrib/chem/examples/122/ch5a_size.chem
index 85a6f5542..d4eb33f6b 100644
--- a/contrib/chem/examples/122/ch5a_size.chem
+++ b/contrib/chem/examples/122/ch5a_size.chem
@@ -9,7 +9,7 @@ ch5a_size.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch6a_pic.chem b/contrib/chem/examples/122/ch6a_pic.chem
index 135aa5879..ad6dea607 100644
--- a/contrib/chem/examples/122/ch6a_pic.chem
+++ b/contrib/chem/examples/122/ch6a_pic.chem
@@ -9,7 +9,7 @@ ch6a_pic.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/ch6b_dna.chem b/contrib/chem/examples/122/ch6b_dna.chem
index 2d036d6e7..00abbbab3 100644
--- a/contrib/chem/examples/122/ch6b_dna.chem
+++ b/contrib/chem/examples/122/ch6b_dna.chem
@@ -9,7 +9,7 @@ ch6b_dna.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAa_polymer.chem b/contrib/chem/examples/122/chAa_polymer.chem
index d8d036fa8..329345447 100644
--- a/contrib/chem/examples/122/chAa_polymer.chem
+++ b/contrib/chem/examples/122/chAa_polymer.chem
@@ -9,7 +9,7 @@ chAa_polymer.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAb_vinyl_chloro.chem b/contrib/chem/examples/122/chAb_vinyl_chloro.chem
index e9f8db247..dff97fc9c 100644
--- a/contrib/chem/examples/122/chAb_vinyl_chloro.chem
+++ b/contrib/chem/examples/122/chAb_vinyl_chloro.chem
@@ -9,7 +9,7 @@ chAb_vinyl_chloro.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAc_morphine.chem b/contrib/chem/examples/122/chAc_morphine.chem
index d3a3a3df5..c9fbf10ce 100644
--- a/contrib/chem/examples/122/chAc_morphine.chem
+++ b/contrib/chem/examples/122/chAc_morphine.chem
@@ -9,7 +9,7 @@ chAc_morphine.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAd_chlorophyll.chem b/contrib/chem/examples/122/chAd_chlorophyll.chem
index d03bd9396..e2acb2255 100644
--- a/contrib/chem/examples/122/chAd_chlorophyll.chem
+++ b/contrib/chem/examples/122/chAd_chlorophyll.chem
@@ -9,7 +9,7 @@ chAd_chlorophyll.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAe_chair.chem b/contrib/chem/examples/122/chAe_chair.chem
index ab5b841af..27b046a69 100644
--- a/contrib/chem/examples/122/chAe_chair.chem
+++ b/contrib/chem/examples/122/chAe_chair.chem
@@ -9,7 +9,7 @@ chAe_chair.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAf_arrow.chem b/contrib/chem/examples/122/chAf_arrow.chem
index eaadd8af5..f135ecbd3 100644
--- a/contrib/chem/examples/122/chAf_arrow.chem
+++ b/contrib/chem/examples/122/chAf_arrow.chem
@@ -12,7 +12,7 @@ delim $$
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAg_circle.chem b/contrib/chem/examples/122/chAg_circle.chem
index dbf6a190b..576c92681 100644
--- a/contrib/chem/examples/122/chAg_circle.chem
+++ b/contrib/chem/examples/122/chAg_circle.chem
@@ -9,7 +9,7 @@ chAg_circle.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAh_brackets.chem b/contrib/chem/examples/122/chAh_brackets.chem
index 498380fa6..7605a3881 100644
--- a/contrib/chem/examples/122/chAh_brackets.chem
+++ b/contrib/chem/examples/122/chAh_brackets.chem
@@ -12,7 +12,7 @@ delim $$
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chAi_poly_vinyl_chloride.chem b/contrib/chem/examples/122/chAi_poly_vinyl_chloride.chem
index 16ca0aaf0..e4539bb01 100644
--- a/contrib/chem/examples/122/chAi_poly_vinyl_chloride.chem
+++ b/contrib/chem/examples/122/chAi_poly_vinyl_chloride.chem
@@ -10,7 +10,7 @@ chAi_poly_vinyl_chloride.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chBa_jump.chem b/contrib/chem/examples/122/chBa_jump.chem
index d84be6430..cd40a3a4e 100644
--- a/contrib/chem/examples/122/chBa_jump.chem
+++ b/contrib/chem/examples/122/chBa_jump.chem
@@ -9,7 +9,7 @@ chBa_jump.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chBb_bonds.chem b/contrib/chem/examples/122/chBb_bonds.chem
index aeee4ebed..bc298952c 100644
--- a/contrib/chem/examples/122/chBb_bonds.chem
+++ b/contrib/chem/examples/122/chBb_bonds.chem
@@ -9,7 +9,7 @@ chBb_bonds.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/122/chBc_rings.chem b/contrib/chem/examples/122/chBc_rings.chem
index f7b7be07b..950cd0ba3 100644
--- a/contrib/chem/examples/122/chBc_rings.chem
+++ b/contrib/chem/examples/122/chBc_rings.chem
@@ -9,7 +9,7 @@ chBc_rings.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 
 # This file is part of 'chem', which is part of 'groff'.
 
diff --git a/contrib/chem/examples/README.txt b/contrib/chem/examples/README.txt
index b61eac56a..678670524 100644
--- a/contrib/chem/examples/README.txt
+++ b/contrib/chem/examples/README.txt
@@ -20,7 +20,7 @@ chemically.
 
 ####### License
 
-Copyright (C) 2006-2018 Free Software Foundation, Inc.
+Copyright (C) 2006-2020 Free Software Foundation, Inc.
 Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/examples/atp.chem b/contrib/chem/examples/atp.chem
index 03cb9488b..738c4da3c 100644
--- a/contrib/chem/examples/atp.chem
+++ b/contrib/chem/examples/atp.chem
@@ -8,7 +8,7 @@ atp.chem:
 
 # Found at http://www.chemindustry.com/apps/chemicals.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 # This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/examples/cholesterin.chem b/contrib/chem/examples/cholesterin.chem
index 2e10b2731..12ac0767f 100644
--- a/contrib/chem/examples/cholesterin.chem
+++ b/contrib/chem/examples/cholesterin.chem
@@ -6,7 +6,7 @@ cholesterin.chem:
 #   10,13-dimethyl-17-(6-methylheptan-2-yl)-2,3,4,5,6,9,11,12,14,15,16,17-
 #     dodecahydro-1H-cyclopenta[a]phenanthren-3-ol
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 # This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/examples/ethamivan.chem b/contrib/chem/examples/ethamivan.chem
index 87f88cd96..a0a8aa2b7 100644
--- a/contrib/chem/examples/ethamivan.chem
+++ b/contrib/chem/examples/ethamivan.chem
@@ -5,7 +5,7 @@ ethamivan.chem:
 #   Ethamivan or Analepticon or C12_H17_N_O3 or
 #   N,N-diethyl-4-hydroxy-3-methoxy-benzamide
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 # This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/examples/lsd.chem b/contrib/chem/examples/lsd.chem
index 2f3e92916..4879ea80b 100644
--- a/contrib/chem/examples/lsd.chem
+++ b/contrib/chem/examples/lsd.chem
@@ -5,7 +5,7 @@ lsd.chem:
 #   LSD or Lysergic acid dethylamide or C20_H25_N3O or
 #   9,10-Didehydro-N,N-diethyl-6-methyl-ergoline-8-beta-carboxamide
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 # This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/examples/morphine.chem b/contrib/chem/examples/morphine.chem
index 7fdc5c554..5c236ca79 100644
--- a/contrib/chem/examples/morphine.chem
+++ b/contrib/chem/examples/morphine.chem
@@ -7,7 +7,7 @@ morphine.chem:
 
 # Found at http://www.chemindustry.com/apps/chemicals.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 # This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/examples/penicillin.chem b/contrib/chem/examples/penicillin.chem
index 7c633e6c0..ef522bcc4 100644
--- a/contrib/chem/examples/penicillin.chem
+++ b/contrib/chem/examples/penicillin.chem
@@ -8,7 +8,7 @@ penicillin.chem:
 
 # Found at http://www.chemindustry.com/apps/chemicals.
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 # This file is part of 'chem', which is part of 'groff'.
diff --git a/contrib/chem/examples/reserpine.chem b/contrib/chem/examples/reserpine.chem
index 97ef7c637..d1b404675 100644
--- a/contrib/chem/examples/reserpine.chem
+++ b/contrib/chem/examples/reserpine.chem
@@ -5,7 +5,7 @@ begin chem
 # Example file for 'chem':
 #   Reserpine or C33H40N2O9
 
-# Copyright (C) 2006-2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2020 Free Software Foundation, Inc.
 # Written by Bernd Warken <groff-bernd.warken-72@web.de>.
 
 # This file is part of 'chem', which is part of 'groff'.